CentOS 5
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Update Kernel
[1] If the kernel in HostOS is updated with yum, Update kernel in Guest too.
[root@ns ~]#
# on Host

[root@ns ~]#
2.6.18-8.1.3.el5xen
[root@ns ~]#
xm console www


[root@www ~]#
# on Guest 'www'

[root@www ~]#
2.6.18-8.1.1.el5xen
# old

[root@www ~]#
# push Ctrl + ]

[root@ns ~]#
# on Host

[root@ns ~]#
mount /dev/Xen/www00 /mnt

[root@ns ~]#
cd /lib/modules

[root@ns modules]#
cp -a 2.6.18-8.1.3.el5xen /mnt/lib/modules/

[root@ns modules]#
vi /etc/xen/www


# change like below

kernel
= "/boot/
vmlinuz-2.6.18-8.1.3.el5xen
"

ramdisk
= "/boot/
initrd-2.6.18-8.1.3.el5xen.img
"

memory
= "512"

name
= "www"

vcpus
= "2"

nicks
= "1"

vif
= [ 'mac=00:16:3e:00:00:11,bridge=xenbr0' ]

disk
= [ 'phy:Xen/www00,hda1,w',

'phy:Xen/www01,hda2,w',
'phy:Xen/www02,hda3,w',
'phy:Xen/www03,hda4,w',
'phy:Xen/www04,hda5,w', ]
root
= "/dev/hda1 ro"

extra
= "3"


[root@ns modules]#
xm shutdown www

[root@ns modules]#
xm create -c www


[root@www ~]#
2.6.18-8.1.3.el5xen
# just changed

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